I have the autometer tach adapter for my car (she came with it) and I've been wanting to get a 5" tach for it since there are already holes in my a-pillar from a previous one, just when I started looking my buddy said his friend is selling a 5" APC tach, I have only seen pictures but I'm going to check it out tomorrow. This tach will work for my car right? Just cause the adapter is autometer doesn't mean the tach has to be, no? Correct me if I'm wrong but that seems logical to me. I just wanna make sure I'm not wasting money that's all, thanks for any input! Also is there any hardware I should be getting in the purchase or is the tach all I'll be expecting?